You could also use this pattern to express what's happening in this very moment, very quickly.

你也可以用这个句型表达某一时刻发生的转瞬即逝的事情。

I'm ~ing 课堂 - SpeakingMax英语口语达人

And it is moving around and we are sitting on that electron watching it go about its daily affairs.

它正在运动,我们正置身与电子上面,观察它时刻发生的事件。

麻省理工公开课 - 固态化学导论课程节选

Cuz I think those moments don't happen everyday, but I think in a career such as yours, I think we can lift those up and be thankful for them.

我认为这种时刻并不是每天都能发生，但在您这样的经历中,我们可以从中学习，感谢这些时刻。

普林斯顿公开课 - 人性课程节选

They merely were there in a time of emergency to prevent hopefully a banking crisis.

它们只是在危急时刻,阻止一个银行业危机的发生。

耶鲁公开课 - 金融市场课程节选